I print a hard copy of my airline tickets, hotel reservations, tour bookings, car rentals, etc. I also write notes about places to visit, maps, and more, and have a file for each future cruise, which I store in gallon-size Ziploc bags. Each topic has a stick-on file tab, in order of use.
No, they won't zip shut but they are a perfect size for printer paper. They lay flat and I can see the itinerary through the bag. They also fit in the front compartment of my carryon bag. ð
This helps compensate for my fading short-term memory. ðĪŠ
Note: I also carry photocopies of my passport/credit cards/Dr. license, etc.